space charge


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Related to space charge: Space charge region

space charge

n.
The excess of electrons or ions in a given volume.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Interfacial space charge layer may be responsible for the thickness dependent [epsilon]' of the PPTMP thin film in the lower frequency region.
Applying the reverse bias voltage, considerable currents leakage can arise from curvature of space charge region of semiconductor along the contact periphery; it helps to reduce the actual height of potential barrier.
However, below 160 K the space charge limited current is the dominant conduction mechanism for [Bi.sub.2][S.sub.3] nanowires [14].
As annular beam has higher space charge limiting current and beam-wave energy conversion efficiency, it is also used widely.
Furthermore, in the observation of upward lightning in winter thunderstorm in Japan, self-initiated upward lightning always starts from the stationary tower under a larger wind speed [8], because the removal of space charge by wind may facilitate the initiation of an upward leader.
The dielectric loss decreases with increase of the frequency for all samples for nanocomposites ; this behavior due to the decrease of polarization at low frequency i.e decrease of space charge polarization with is found at low frequency, of high frequency, The polarization types are ionic and electric polarization.
This is attributed to the space charge polarization that occurs at low frequencies and the motion of electronic charge carriers.
Form the TEM results the phenomena of space charge and blocking effects were well understood.
The software is available in many variants, with generic 2D and 3D finite element solvers and application- specific solvers for static and time-varying low-frequency and high-frequency electromagnetic, electrostatic, magnetostatic, structural, thermal and space charge design problems.
The effects of space charge, self-magnetic fields and relativistic particle flow are included in the analysis.
Developed from the sequential processing version of Opera's space charge solver, also known as SCALA, the newly parallelized 3D Space Charge module uses code that is optimized for the shared memory architecture of standard PCs and workstations with multi-core processors.
where D is electric flux density vector, [rho]V is volume density of space charge, E is electric field strength vector, V is potential, V' is volume, W is energy, q is electric charge, U is voltage, A is surface area and dA is area element vector.